Massage gun



FIG. 1 is a front perspective view of a massage gun showing my new design;

FIG. 2 is a right elevational view thereof;

FIG. 3 is a left elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a back elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown in the figures are for the purpose of illustrating portions of the massage gun, which form no part of the claimed design. 

CLAIM The ornamental design for a massage gun, as shown and described. 